131221240411221 has 12 divisors (see below), whose sum is σ = 197782739170848. Its totient is φ = 83677312725864.

The previous prime is 131221240411213. The next prime is 131221240411259. The reversal of 131221240411221 is 122114042122131.

131221240411221 is a `hidden beast` number, since 1 + 3 + 1 + 2 + 2 + 1 + 24 + 0 + 411 + 221 = 666.

It is not a de Polignac number, because 131221240411221 - 2³ = 131221240411213 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131221240411271) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 316959517695 + ... + 316959518108.

It is an arithmetic number, because the mean of its divisors is an integer number (16481894930904).

Almost surely, 2^{131221240411221} is an apocalyptic number.

It is an amenable number.

131221240411221 is a deficient number, since it is larger than the sum of its proper divisors (66561498759627).

131221240411221 is a wasteful number, since it uses less digits than its factorization.

131221240411221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633919035832 (or 633919035829 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

Adding to 131221240411221 its reverse (122114042122131), we get a palindrome (253335282533352).

The spelling of 131221240411221 in words is "one hundred thirty-one trillion, two hundred twenty-one billion, two hundred forty million, four hundred eleven thousand, two hundred twenty-one".